| Document And Entity Information | Dec. 09, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 09, 2024 |
| Entity Registrant Name | Genasys Inc. |
| Entity Central Index Key | 0000924383 |
| Entity Emerging Growth Company | false |
| Entity File Number | 000-24248 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 87-0361799 |
| Entity Address, Address Line One | 16262 West Bernardo Drive |
| Entity Address, City or Town | San Diego |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92127 |
| City Area Code | 858 |
| Local Phone Number | 676-1112 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, $0.00001 par value per share |
| Trading Symbol | GNSS |
| Security Exchange Name | NASDAQ |
